Paragraph structure refers to the way a paragraph is organized to effectively convey a single idea. Typically, a well-structured paragraph begins with a topic sentence that introduces the main idea. This is followed by supporting sentences that provide details, examples, or explanations to elaborate on the topic. At the end of the paragraph, a concluding sentence may summarize the main point or provide a transition to the next paragraph. This structure helps readers easily follow the writer's thoughts and enhances the overall clarity of the text, making it more engaging and informative.